//al caricamento funzione xajax
//richiede jQuery.blockUI , xjax
//http://malsup.com/jquery/block/#options

xajax.callback.global.onRequest = function(){
			jQuery.blockUI({ 
              	 message: '<br><h1 style="color: #4486ff;font-size: 11px;font-family: Verdana;"><img src="http://www.12print.it/img/loader/circle-ajax-loader.gif"> Caricamento in corso .... </h1><br>', 
                css: { border: '3px solid #4486ff'} 
				
			
							}); 
			};
//a fine caricamento fuziona ajax
xajax.callback.global.onComplete = function(args){
			jQuery.unblockUI();
			}